Qualification > Math

IMPORTANTTT

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cooldude:

--- Quote from: halosh92 on August 06, 2010, 07:17:00 pm ---am sorry the questions are basic
but could u gimmi the answer for this

2^40 + 2^40+ 2^40 + 2^40
???

--- End quote ---

= 4*(2^40)
= (2^2)*(2*40)
now use the law of indices (2^x)*(2^y)=(2^(x+y))
therefore --> 2^(40+2)=2^42

halosh92:
ok and this one  also

  solve for x : l 5x-6 l   + 3 = 10
the solution set is:
a)-1/5
b)13/5
c)7/5
d)-7/5
e) none of these.

cooldude:

--- Quote from: halosh92 on August 06, 2010, 07:32:07 pm ---ok and this one  also

  solve for x : l 5x-6 l   + 3 = 10
the solution set is:
a)-1/5
b)13/5
c)7/5
d)-7/5
e) none of these.

--- End quote ---

7= | 5x-6 |
7=5x-6 and 7=-(5x-6)
therefore x=13/5, -1/5
therefore a and b

halosh92:
32^(2/5)  +  16^(1/4)

cooldude:

--- Quote from: halosh92 on August 06, 2010, 07:50:03 pm ---32^(2/5)  +  16^(1/4)

--- End quote ---

(32^(1/5))^2 + (2^4)^(1/4)
2^2 + 2=6

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